How to execute DCMT commands automatically at startup

Products

• IDMS
• IDMS - Database

Issue/Introduction

What is the easiest way to execute DCMT commands automatically at startup?

Environment

Release: All supported releases
Component: IDMS/DB

Resolution

A Startup Autotask can execute a program that calls RHDCMT00 to issue DCMT commands.

See Invoking DCMT and DCUF Commands from Programs.

But the EASIEST way to execute a set of DCMT commands is to use an INOUTL LINE.

Example of sysgen definitions:

     ADD LINE SYSIO1
         ENABLED
         NOCOMPACT
         PROTOCOL IS DEFRESP
         TYPE IS INOUTL
         INPUT DDNAME IS SYSIN1
         OUTPUT DDNAME IS SYSOUT1
         .
     ADD PTERM SYSIOP1
         ENABLED
         IN LINE SYSIO1
         MAXIMUM ERRORS IS 3
         PRINTER CLASS IS 1
         READBUFFER
         TYPE IS INOUTT
         PAGE LENGTH IS 24
         .
     ADD LTERM SYSIOL1
         ENABLED
         PRIORITY IS 0
         PTERM IS SYSIOP1
         .                       

Then in the CV Startup JCL include the DD names defined in the LINE.

For Example:

//SYSIN1   DD DSN=YOUR.HLQ.SYSIN1.PDS(SYSIN1),DISP=SHR 
//SYSOUT1  DD SYSOUT=*                                          

The contents of  the SYSIN1 dataset in this example:

S USER1
DCMT V SNAP TASK OFF
BYE

In the IDMS LOG after the startup has completed I see the following messages:

IDMS DC258003 V1850 USER USER1 SIGNED ON LTERM SYSIOL2 AT 14:07:24.40
IDMS DC260100 V1850 USER:USER1 DCMT      V SNAP TASK OFF
IDMS DC278005 V1850 USER:USER1  TASK SNAP VARIED OFF (DISABLED)
IDMS DC259001 V1850 USER USER1 SIGNED OFF LTERM SYSIOL2 AT 14:07:24.50

Note if the DCMT Task is unsecured and the DCMT commands you want to execute this way are not secured using #CTABGEN, then the signon is not necessary.  If either is secured the signon must be a valid user and password that holds the relevant privileges

Additional Information

Defining an INOUTL line